Level Five:All of Levels One–Four skills PLUS final consonant blends, common long vowel pairs, and change y to i and add –es to make plural

Level Six:All of Levels One–Five skills PLUS beginning, middle, and final consonant digraphs, including ph and gh with /f/ sound; silent letters such as the k in kn; and plural endings –s and –es for base words ending in s, ss, ch, sh, x, or z